EP1724699A1 - Procédé et système de dégradation graduelle de la qualité de contenu numérique dans un système DRM - Google Patents

Procédé et système de dégradation graduelle de la qualité de contenu numérique dans un système DRM Download PDF

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Publication number
EP1724699A1
EP1724699A1 EP05010681A EP05010681A EP1724699A1 EP 1724699 A1 EP1724699 A1 EP 1724699A1 EP 05010681 A EP05010681 A EP 05010681A EP 05010681 A EP05010681 A EP 05010681A EP 1724699 A1 EP1724699 A1 EP 1724699A1
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EP
European Patent Office
Prior art keywords
multimedia content
digital multimedia
cont
portable electronic
electronic device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05010681A
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German (de)
English (en)
Inventor
Rolf Theisen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP05010681A priority Critical patent/EP1724699A1/fr
Publication of EP1724699A1 publication Critical patent/EP1724699A1/fr
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
    • G11B20/00818—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction limits the signal quality, e.g. by low-pass filtering of audio signals or by reducing the resolution of video signals
    • G11B20/00826—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction limits the signal quality, e.g. by low-pass filtering of audio signals or by reducing the resolution of video signals wherein a spoiler signal is added to degrade the signal quality
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy

Definitions

  • the invention relates to the field of software agents, to portable electronic devices and to systems for digital rights management. Furthermore, the invention relates to a method for managing use rights for digital multimedia content.
  • a further copy protection technique is based on superimposing water marks to the digital multimedia content.
  • the water marking is invisible for the user and it can be used for identifying the source of pirate copies of the multimedia digital content.
  • a CD can be protected with a code printed on the original cover.
  • a proprietary playback device is then necessary.
  • Digital multimedia content such as audio, video, images or software can be relatively easily copied illegally or forwarded to a third party.
  • the concept of Digital Rights Management DRM refers to protecting the copyright, usually belonging to the author or his/her successor, on digital multimedia content.
  • a particular objective of DRM is to prohibit unauthorized use and distribution of digital multimedia content.
  • the underlying business model of a digital multimedia content provider can be effected by way of digital rights management.
  • a content provider ensures itself revenue of the sales of digital multimedia content by regulating use rights.
  • the use rights may define the period of validity for using the digital multimedia content, the allowed frequency of the use, or the transferability of the digital multimedia content onto other devices or persons.
  • This object can be achieved with a software agent as set out in claim 1, with a portable electronic device as set out in claim 7, and with a digital rights management system as set out in claim 10.
  • the object of the invention can be achieved by using a method according to claim 11.
  • a software agent for digital rights management comprising a unit adapted to manage use rights for a given digital multimedia content at a given portable electronic device, is adapted to gradually degrade the quality of the digital multimedia content upon reading or otherwise invoking the digital multimedia content, a new way to limit the use of the digital multimedia content can be achieved.
  • the degradation of quality of the digital multimedia content enables using the digital multimedia content for advertisement purposes without necessarily severely compromising the sales of a given digital multimedia content.
  • the client may in the beginning be given a full-quality access to the digital multimedia content. In this manner, the client initially gets an overall impression of the product. Later, he or she can repeatedly use the digital multimedia content, but since the quality gradually degrades, the owner of the copyright suffers practically no financial damage and the manufacturer or seller of the product can arrange to negotiate a less expensive royalty agreement with the copyright owner.
  • the software agent further comprises a) a unit adapted to decrypt the digital multimedia content, b) a unit adapted to gradually degrade the quality of the digital multimedia content, and c) a unit adapted to encrypt the digital multimedia content after it has been degraded, the degradation can be achieved without compromising the copy protection, since it can be ensured not only that the digital multimedia content is degraded when it has been read and decrypted but also that it is again encrypted after having been degraded.
  • the degradation is performed by adding noise to the digital multimedia content, by adding errors to the digital multimedia content, or by decreasing the functional scope of the digital multimedia content, different ways to effect the degradation can be achieved, each at best suitable for a given type of digital multimedia content.
  • a portable electronic device comprises a processing unit, means adapted to receive encrypted digital multimedia content, and a software agent according to the invention that has been adapted, when executed in the processing unit, to reproduce the digital multimedia in a format that allows play-back
  • a portable electronic device that supports the quality degradation can be achieved.
  • This offers more possibilities for utilizing DRM for promoting sales without compromising the copyright owner's position.
  • the position of a possible licensee distributing the digital multimedia content may be improved since the digital multimedia content is not only copy-protected but also its quality degrades gradually.
  • a digital rights management system for digital multimedia content comprises at least one data storage wherein use rights for given digital multimedia content are stored so that the use rights comprise a property of gradual degradation for at least some of the digital multimedia content, managing of the degrading can be carried out in a reasonable manner.
  • FIG. 1 shows a portable electronic device 101.
  • the portable electronic device 101 may be in connection to a content provision system 111 via the Internet 150, via a communication network 100, or via a digital multimedia content distribution server 113 such as a "multimedia booth", a vending machine for digital multimedia content.
  • the ways in which the portable electronic device 101 may have a connection to the content provision system 111 are optional, and it is possible that for a given portable electronic device 101 only an arbitrary subset of them has been enabled whereas for another portable electronic device 101 all ways have been enabled.
  • the portable electronic device 101 comprises a receiving and transmitting unit RX/TX, a processing unit CPU, such as a microprocessor, and means 103 for reproducing digital multimedia content.
  • the means 103 for reproducing digital multimedia content may comprise one or more codecs for reproducing an audio or image file, and it may further comprise means for converting the reproduced audio or image file to an aural or visual representation of the digital multimedia content.
  • the portable electronic device 101 further comprises a software agent 107 for digital rights management.
  • the software agent 107 comprises a unit 106 adapted to manage use rights for multimedia content at the portable electronic device 101.
  • the software agent 107 is adapted to gradually degrade the quality of a digital multimedia content upon reading or otherwise invoking the digital multimedia content.
  • the software agent 107 may comprise a unit 105 adapted to decrypt digital multimedia content, and a unit 108 adapted to gradually degrade the quality of digital multimedia content.
  • the software agent then may further comprise a further unit for encrypting the digital multimedia content after it has been degraded, or the decryption unit 105 may be adapted to perform the encrypting.
  • a portable electronic device 101 requests a particular digital multimedia content from content provision system 111 by sending a request J01.
  • the content provision system 111 answers by sending a service response J03 which comprises the digital multimedia content CONT the portable electronic device 101 requested.
  • the service response J03 may be transmitted to the portable electronic device 101 over a wireless interface, such as over the communication network 100, in which case the service response J03 is passed from the content provision system 111 to a Gateway-Call Service Control Function CSCF (G-CSCF) 127.
  • G-CSCF Gateway-Call Service Control Function
  • the G-CSCF 127 passes the service response J03 then preferably through a Serving-CSCF 125 and a Proxy-CSCF 123 through the radio access network to the portable electronic device 101.
  • the radio access network comprises in this example one or more Radio Network Controllers 121 that control Base Stations 102 that transmit the actual messages from the communication network 100 to the portable electronic device 101, and from the portable electronic device 101 to the communication network 100.
  • the subscription data of the portable electronic device 101 for the communication network 100 is preferably stored in a Home Subscriber Server HSS 129.
  • the portable electronic device 101 is adapted to subscribe or receive digital multimedia content CONT through the communication network 100, the portable electronic device 101 is then preferably a terminal of said communication network 100.
  • Such communication networks comprise all third generation (3G) networks, GSM and GPRS networks, CDMA networks.
  • the software agent 107 at the portable electronic device 101 registers the digital multimedia content CONT at digital rights management system 121 by sending a registration message K01.
  • the digital rights management system 121 sends to the portable electronic device 101 a rights response message K03 that comprises use rights RGHTS.
  • the communication network 100 can be used for transmitting the request J01 and the service response J03.
  • a property of gradual degradation has been associated to digital multimedia content. This property has then been stored in a database DB.
  • the gradual degradation may correspond to an "aging property" of the digital multimedia content.
  • the unit 106 in the software agent 107 upon receiving the use rights RGHTS, associates the digital multimedia content CONT with the property of gradual degradation. Whenever the digital multimedia content CONT is read or otherwise invoked, its quality is degraded. The speed of the degradation may be set at the digital rights management system 121.
  • the portable electronic device 101 may be a multimedia playback device. Then the receiving and transmitting unit RX/TX may be adapted to receive encrypted digital multimedia content CONT directly from a digital multimedia content distribution server 113. Directly means in this context that the reception takes place without help of the communication network 100. To effect this, the portable electronic device 101 may be in a wireless connection to the digital multimedia content distribution server 113 over an air interface. The digital multimedia content distribution server 113 may then carry out the further messaging between the content provision system 111 or the digital rights management system 121.
  • the Internet 150 may be used for the transmitting the requests J01, K01 and for receiving responses J03, K03.
  • the receiving and transmitting unit RX/TX is preferably adapted to be in a wireless connection to the Internet.
  • the kind of degradation may depend on the kind of the digital multimedia content.
  • noise can be added, such as in the PCM format, thus decreasing signal-to-noise ratio.
  • video content bits may be altered to increase noise or to decrease the bit-to-error rate.
  • the functional scope of the game can be gradually decreased. This can be carried out e.g. by reducing the percentage of functions available from that of the full functional scope.
  • the method proposed by the OMA is extended by the possibility to define in use rights also a feature whether the quality of the digital multimedia content is degraded after reading the digital multimedia content. Depending on the digital multimedia content, the multimedia content is changed. The speed of the degradation, i.e. to what extent the degradation is provided through the use rights.
  • the DRM agent at the mobile terminal overtakes this task.
  • the complete digital multimedia content CONT may be degraded. Alternatively, only the part that was read may be degraded.
  • the digital multimedia content CONT is transmitted to the portable electronic device 101 together with the software agent 107, i.e. software for playing back the digital multimedia content CONT.
  • the software agent 107 i.e. software for playing back the digital multimedia content CONT.
  • the digital multimedia content CONT is degraded by using the unit 106 that may have been integrated to the software agent 107. It is now possible to copy the complete software, but the digital copying of the digital multimedia content can become very difficult.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Multimedia (AREA)
  • Computer Hardware Design (AREA)
  • Technology Law (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Storage Device Security (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
EP05010681A 2005-05-17 2005-05-17 Procédé et système de dégradation graduelle de la qualité de contenu numérique dans un système DRM Withdrawn EP1724699A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05010681A EP1724699A1 (fr) 2005-05-17 2005-05-17 Procédé et système de dégradation graduelle de la qualité de contenu numérique dans un système DRM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05010681A EP1724699A1 (fr) 2005-05-17 2005-05-17 Procédé et système de dégradation graduelle de la qualité de contenu numérique dans un système DRM

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EP1724699A1 true EP1724699A1 (fr) 2006-11-22

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EP05010681A Withdrawn EP1724699A1 (fr) 2005-05-17 2005-05-17 Procédé et système de dégradation graduelle de la qualité de contenu numérique dans un système DRM

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008068733A2 (fr) * 2006-12-07 2008-06-12 Markport Limited Communication de contenu de réseau mobile
US20100056269A1 (en) * 2008-09-03 2010-03-04 Sony Computer Entertainment America Inc. Feature eroding video game demonstration software
US20110131664A1 (en) * 2009-12-01 2011-06-02 Sony Ericsson Mobile Communications Ab Content aging
FR2983606A1 (fr) * 2011-12-02 2013-06-07 France Telecom Procede d'acces a un contenu numerique
CN103597488A (zh) * 2011-04-11 2014-02-19 英特托拉斯技术公司 信息安全系统和方法
US9235834B2 (en) 2003-06-05 2016-01-12 Intertrust Technologies Corporation Interoperable systems and methods for peer-to-peer service orchestration
US9311455B1 (en) * 2008-10-07 2016-04-12 Amdocs Software Systems Limited System, method, and computer program for distributing payment to digital content owners
US9626667B2 (en) 2005-10-18 2017-04-18 Intertrust Technologies Corporation Digital rights management engine systems and methods
US20170109505A1 (en) * 2014-07-03 2017-04-20 Sony Corporation Information processing device, information processing method, and content sharing system

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WO1997043761A2 (fr) * 1996-05-15 1997-11-20 Intertrust Technologies Corp. Procedes, appareils et systemes de chiffrement pour la gestion electronique des droits relatifs aux supports de stockage dans des appareils fermes et interconnectes
EP0977200A1 (fr) * 1998-02-19 2000-02-02 Sony Corporation Appareil et procede d'enregistrement / reproduction, et processeur de donnees
US20020009000A1 (en) * 2000-01-18 2002-01-24 Qdesign Usa, Inc. Adding imperceptible noise to audio and other types of signals to cause significant degradation when compressed and decompressed
US20020107750A1 (en) * 2001-02-05 2002-08-08 International Business Machines Corporation System and method for software selling
US20030046578A1 (en) * 2001-09-05 2003-03-06 International Business Machines Incorporation Apparatus and method for providing access rights information in metadata of a file
US20030081780A1 (en) * 2001-10-31 2003-05-01 Kim Jason Seung-Min Digital entroping for digital audio reproductions
US20030216824A1 (en) * 2002-05-14 2003-11-20 Docomo Communications Laboratories Usa, Inc. Method and apparatus for self-degrading digital data

Patent Citations (7)

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WO1997043761A2 (fr) * 1996-05-15 1997-11-20 Intertrust Technologies Corp. Procedes, appareils et systemes de chiffrement pour la gestion electronique des droits relatifs aux supports de stockage dans des appareils fermes et interconnectes
EP0977200A1 (fr) * 1998-02-19 2000-02-02 Sony Corporation Appareil et procede d'enregistrement / reproduction, et processeur de donnees
US20020009000A1 (en) * 2000-01-18 2002-01-24 Qdesign Usa, Inc. Adding imperceptible noise to audio and other types of signals to cause significant degradation when compressed and decompressed
US20020107750A1 (en) * 2001-02-05 2002-08-08 International Business Machines Corporation System and method for software selling
US20030046578A1 (en) * 2001-09-05 2003-03-06 International Business Machines Incorporation Apparatus and method for providing access rights information in metadata of a file
US20030081780A1 (en) * 2001-10-31 2003-05-01 Kim Jason Seung-Min Digital entroping for digital audio reproductions
US20030216824A1 (en) * 2002-05-14 2003-11-20 Docomo Communications Laboratories Usa, Inc. Method and apparatus for self-degrading digital data

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9466054B1 (en) 2003-06-05 2016-10-11 Intertrust Technologies Corporation Interoperable systems and methods for peer-to-peer service orchestration
US9235833B2 (en) 2003-06-05 2016-01-12 Intertrust Technologies Corporation Interoperable systems and methods for peer-to-peer service orchestration
US9235834B2 (en) 2003-06-05 2016-01-12 Intertrust Technologies Corporation Interoperable systems and methods for peer-to-peer service orchestration
US9424564B2 (en) 2003-06-05 2016-08-23 Intertrust Technologies Corporation Interoperable systems and methods for peer-to-peer service orchestration
US9317843B2 (en) 2003-06-05 2016-04-19 Intertrust Technologies Corporation Interoperable systems and methods for peer-to-peer service orchestration
US9626667B2 (en) 2005-10-18 2017-04-18 Intertrust Technologies Corporation Digital rights management engine systems and methods
WO2008068733A2 (fr) * 2006-12-07 2008-06-12 Markport Limited Communication de contenu de réseau mobile
WO2008068733A3 (fr) * 2006-12-07 2008-09-12 Markport Ltd Communication de contenu de réseau mobile
US20100056269A1 (en) * 2008-09-03 2010-03-04 Sony Computer Entertainment America Inc. Feature eroding video game demonstration software
US9311455B1 (en) * 2008-10-07 2016-04-12 Amdocs Software Systems Limited System, method, and computer program for distributing payment to digital content owners
WO2011067686A1 (fr) * 2009-12-01 2011-06-09 Sony Ericsson Mobile Communications Ab Vieillissement de contenu
US20110131664A1 (en) * 2009-12-01 2011-06-02 Sony Ericsson Mobile Communications Ab Content aging
EP2697929A2 (fr) * 2011-04-11 2014-02-19 Intertrust Technologies Corporation Systèmes et procédés de sécurité d'informations
US9589110B2 (en) 2011-04-11 2017-03-07 Intertrust Technologies Corporation Information security systems and methods
CN103597488A (zh) * 2011-04-11 2014-02-19 英特托拉斯技术公司 信息安全系统和方法
CN103597488B (zh) * 2011-04-11 2016-08-24 英特托拉斯技术公司 信息安全系统和方法
US10009384B2 (en) 2011-04-11 2018-06-26 Intertrust Technologies Corporation Information security systems and methods
EP2697929A4 (fr) * 2011-04-11 2014-09-24 Intertrust Tech Corp Systèmes et procédés de sécurité d'informations
FR2983606A1 (fr) * 2011-12-02 2013-06-07 France Telecom Procede d'acces a un contenu numerique
US20170109505A1 (en) * 2014-07-03 2017-04-20 Sony Corporation Information processing device, information processing method, and content sharing system

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